remove hhvm testing, fails with ...

Using worker: worker-linux-5-2.bb.travis-ci.org:travis-linux-12
git.1
$ git clone --depth=50 --branch=develop-2 git://github.com/auraphp/Aura.Web.git auraphp/Aura.Web
Cloning into 'auraphp/Aura.Web'...
remote: Counting objects: 1284, done.
remote: Compressing objects: 100% (599/599), done.
remote: Total 1284 (delta 618), reused 1238 (delta 586)
Receiving objects: 100% (1284/1284), 287.93 KiB, done.
Resolving deltas: 100% (618/618), done.
$ cd auraphp/Aura.Web
git.3
$ git checkout -qf aa28cd8ff37af17f8e3bd89f0637498eb63150b0
$ phpenv global hhvm
$ php --version
HipHop VM v2.3.0 (rel)
Compiler: heads/HHVM-2.3-0-ga12fa4ac4dacbb45348a6ff2b3775f895883f934
Repo schema: 30349d0b2f68667d4e5a3fd291f2274c608f9e29
$ composer --version
Cannot open log file: /var/log/hhvm/error.log
HipHop Strict Warning: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead in phar://composer.phar/bin/../src/../src/Composer/Console/Application.php on line 65
Composer version 80499bb02418711b34bba59c1a6d8032429e5702 2013-12-06 12:32:19
before_script
$ cd tests
$ phpunit
Cannot open log file: /var/log/hhvm/error.log
PHPUnit 3.7.28 by Sebastian Bergmann.
Configuration read from /home/travis/build/auraphp/Aura.Web/tests/phpunit.xml
................................................................E 65 / 98 ( 66%)
..EE...........E...E...E.........
Time: 677 ms, Memory: 5.56Mb
There were 6 errors:
1) Aura\Web\Response\CacheTest::testDisable
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:396
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:220
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:88
/home/travis/build/auraphp/Aura.Web/tests/src/Response/CacheTest.php:32
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
2) Aura\Web\Response\CacheTest::testSetExpires
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:396
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:220
/home/travis/build/auraphp/Aura.Web/tests/src/Response/CacheTest.php:62
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
3) Aura\Web\Response\CacheTest::testLastModified
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:396
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:236
/home/travis/build/auraphp/Aura.Web/tests/src/Response/CacheTest.php:77
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
4) Aura\Web\Response\CookiesTest::testGetAll
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/tests/src/Response/CookiesTest.php:34
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
5) Aura\Web\Response\RedirectTest::testAfterPost
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:396
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:220
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:88
/home/travis/build/auraphp/Aura.Web/src/Response/Redirect.php:134
/home/travis/build/auraphp/Aura.Web/src/Response/Redirect.php:77
/home/travis/build/auraphp/Aura.Web/tests/src/Response/RedirectTest.php:42
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
6) Aura\Web\Response\RedirectTest::testSeeOther
It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:396
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:220
/home/travis/build/auraphp/Aura.Web/src/Response/Cache.php:88
/home/travis/build/auraphp/Aura.Web/src/Response/Redirect.php:134
/home/travis/build/auraphp/Aura.Web/tests/src/Response/RedirectTest.php:82
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:983
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:838
phar://phpunit-3.7.28.phar/phpunit/Framework/TestResult.php:648
phar://phpunit-3.7.28.phar/phpunit/Framework/TestCase.php:783
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:775
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:745
phar://phpunit-3.7.28.phar/phpunit/Framework/TestSuite.php:705
phar://phpunit-3.7.28.phar/phpunit/TextUI/TestRunner.php:349
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:176
phar://phpunit-3.7.28.phar/phpunit/TextUI/Command.php:129
FAILURES!
Tests: 98, Assertions: 358, Errors: 6.
The command "phpunit" exited with 2.
Done. Your build exited with 1.